Water-heater for boilers



(No Model.) V

T. CLIFFORD.

WATER HEATER FOR BOILERS. v No. 347,772. Patented Aug. 24, 1886.

N. PETERS, Pnmump m m. Washington a. c.

7 UNITED STATES PATENT OFFICE.

THOMAS CLIFFORD, OF MOUNT SAVAGE, MARYLAND.

WATER-HEATER FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 37,772, dated August24, 1886;

Application filed May 13, 1886. Serial No. 202,114.

To all whom it may concern:

Be it known that l, THOMAS CLIFFORD, a citizen of the United States,residingin Mount Savage, in the countyoi' Alleghany and State ofMaryland, have invented certain new and useful Improvemen s inater-Heaters for Locomotive-Boilers, of which the followingis adescription.

Theinveution consists in certain novel parts and combinations of parts,in connection with a steam-boiler and its smoke-box, whereby the heatcontained in the'escaping volatile products of combustion is effectivelyutilized in heating water preparatory to the discharge of the same intothe boiler.

In the drawings, Figure 1 is partly a perspective and partly atransverse sectional view of a locomotiveengine boiler in which myimprovements are applied. Fig. 2 is a longitudinal central section onthe line :0 0c of Fig. 1. e

\Vithin the shell A of the smoke-box A are fitted the annular heads aand a, the head a encircling the prolongation e of the boiler E, and thehead a abutting against the ring D. Concentric with the shell A is theinner cy1 iuder,A'", which is provided with the annular head a whichcloses the space between the body of the cylinder and the exterior faceof the prolongation e of the boiler and which is provided also with theinterior annular flange, a,which'isj0ined at its outerperiphery to thecylinder and at its inner edge to the rear face of the ring D. The heada is provided with a series of tapped openings to receive the innerthreaded end, I), of the water-tubes B, the opposite extremities of suchtubes being received within a corresponding series of openings formed inthe head or flange a The head or outer plate, A, of the smoke-box isprovided with tapped openings for the insertion or removal of thewater-tubes B, and for the insertion of a flue-cleaner when it becomesnecessary to remove accumulations of sedimentary matter, such openingsbeing normal 1 y closed by screw-nuts a. A ring, J, at the base is ofthe smoke-stack K, and between such base and the cylinder A",constitutes an extension downward of the smoke-stack, and completes thejacket or water-heater L.

At a suitable point near the base of the (No model.)

jacket or water-chamber L, a coldwater-induction pipe, G, isintroduced,the inflow through such pipe being controlled by aclieclrvalve, 9. Water being supplied by means of this pipe G,circulates rapidly through the water-tubes B and through the flange-likepockets land 1 of the water-chamber or jacket L, and being quicklyheated by the escaping products of combustion, which, entering from theboilerflues, thoroughly envelop the water-tubes and the interior surfaceof the waterjacket, is discharged at the top of the waterjacket throughthe hot-water pipe H, into the interior of the boiler E, such dischargebeing regulated by the check-valve h.

In some cases it may be desirable not to extend the jacket entirelyacross the bottom of the smoke-box, that portion of the same being muchless highly heated than the upper and side port-ions. I prefer, however,the construction which I have shown and described, as presenting aneffective means for utilizing the waste heat of the products ofcombustion.

Having described my invention, Iclaim- 1. The combination, with a SlDOl8-l)OX, of an encircling water-jacket provided with inwardly-extendingpockets,aud with longitudinal water-tubes extending through thesmokespace, and connecting the inwardly-extending pockets, substantiallyas and for the purposes I described.

2. A smoke-box which is provided with an exterior longitudinalwater-chamber which encircles the sides and partially incloses the endsof such smokebox, and which has longitudinal water-tubes which extendacross the path of the escaping products of combustion, and whichconnect the oppositely-placed inclosing end portions of thewater-chamber.

3. The combination, with a smoke-box, of an encircling water-chamberwhich has in wardly-extending oppositely-placed end portions, andwater-tubes which connect such end portions, and an end plate or headwhich is provided with orifices which are coincident with thewater-tubes, and with screw-nuts for closing such orifices.

THOMAS CLIFFORD.

Witnesses:

JOHN BRISCOE, CHAS. MILLER.

